:root{--paper:#f8f7f2;--ink:#293d35;--muted:#7c8176;--line:#e0e2d8;--green:#3b6551;--serif:Georgia,'Times New Roman',serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.65 -apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif;-webkit-font-smoothing:antialiased}.review-banner{min-height:36px;display:flex;align-items:center;justify-content:center;gap:9px;padding:7px 16px;background:#eaf0e6;color:#56704e;font-size:11px;letter-spacing:.4px}.review-dot{width:5px;height:5px;border-radius:50%;background:#769165}.banner-divider{opacity:.4;margin:0 5px}.site-header{max-width:1192px;padding:28px 40px 22px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-size:16px;text-decoration:none;font-weight:550;letter-spacing:.6px}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border:1px solid #c9d3c4;border-radius:8px;font:21px 'Songti SC',serif;color:var(--green)}.preview-label{font-size:11px;color:#95998e}.site-nav{display:flex;align-items:center;justify-content:center;gap:37px;padding:0 20px;border-bottom:1px solid var(--line);color:#8c9387;font-size:12px}.site-nav>span{display:block;padding:13px 0 16px;white-space:nowrap}.site-nav .nav-current{color:var(--green);border-bottom:2px solid var(--green)}main{max-width:768px;margin:0 auto;padding:58px 36px 36px}.reading-meta{display:flex;justify-content:space-between;gap:20px;color:#8b9184;font-size:10px;letter-spacing:2px}.meta-slash{color:#c1c8b9;margin:0 10px}.meta-dot{letter-spacing:0;margin:0 6px}.article-header{margin:32px 0 36px}.chinese-title{font:15px/1.8 'Songti SC',STSong,serif;letter-spacing:1.2px;color:#7b8777;margin:0 0 11px}h1{font:normal 42px/1.18 var(--serif);letter-spacing:-1px;color:#294436;margin:0;max-width:650px}.article-rule{width:35px;height:2px;background:#9dac8e;margin-top:28px}.article-body{font:20px/1.95 var(--serif);color:#344137;letter-spacing:.04px;overflow-wrap:break-word}.article-body p{margin:0 0 1.5em}.article-body p:last-child{margin-bottom:0}.reading-end{display:flex;justify-content:center;align-items:center;gap:16px;margin:42px auto 13px;max-width:136px}.reading-end>span:not(.end-mark){height:1px;background:#d6ddce;flex:1}.end-mark{color:#9eac92;font:14px 'Songti SC',serif}.end-note{font-size:11px;color:#959e8b;text-align:center;margin:0 0 56px}.sketch{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.sketch summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:21px 0;font-size:12px;color:#566b55}.sketch summary::-webkit-details-marker{display:none}.sketch summary>span:first-child:before{content:'＋';margin-right:9px;font-size:14px;color:#7c8e70}.sketch[open] summary>span:first-child:before{content:'−'}.summary-note{font-size:10px;color:#9aa18f}.sketch-inner{padding:0 0 22px}.sketch-intro,.sketch-footnote{font-size:12px;color:#8b9384;line-height:1.85}.sketch-example{margin:28px 0;padding:0 0 24px;border-bottom:1px dashed #e0e4d7}.sketch-caption{color:#7f8d73;font-size:10px;letter-spacing:.4px;margin-bottom:12px}.example-sentence{font:19px/1.95 var(--serif);margin:0;color:#364538}.sentence-selected{background:#e7eddf;box-shadow:0 3px #e7eddf,0 -3px #e7eddf;border-radius:2px}.floating-tools{display:inline-flex;align-items:center;flex-wrap:wrap;gap:16px;background:#fffefa;border:1px solid #e1e5d9;box-shadow:0 5px 18px #293d350a;border-radius:7px;padding:11px 14px;margin-top:17px;font-size:11px;color:#657358}.floating-tools i{width:1px;height:12px;background:#e4e7dc}.word-mark{color:#386995;text-decoration:underline;text-decoration-color:#7ba0c1;text-underline-offset:4px;text-decoration-thickness:1px}.confused-mark{background:#f8e8d9;box-shadow:0 2px #f8e8d9;border-radius:2px}.legend{display:flex;flex-wrap:wrap;gap:20px;margin:17px 0 0;font-size:11px;color:#8a9282}.legend>span{display:flex;align-items:center;gap:7px}.legend i{display:inline-block;width:13px;height:9px}.legend-word{border-bottom:1px solid #7ba0c1}.legend-confused{background:#f8e8d9;border-radius:2px}.sketch-footnote{font-size:10px;margin:0}.review-footer{display:flex;justify-content:space-between;gap:14px;padding:24px 0 0;font-size:10px;color:#a1a796}@media(min-width:1200px){main{padding-top:66px}}@media(max-width:620px){.review-banner{font-size:10px;gap:6px}.banner-divider{margin:0 2px}.site-header{padding:20px 23px 15px}.brand{font-size:14px}.brand-mark{width:30px;height:30px;font-size:19px}.preview-label{font-size:9px}.site-nav{justify-content:space-between;gap:16px;padding:0 23px;overflow-x:auto}.site-nav>span{font-size:11px;padding-top:10px;padding-bottom:12px}main{padding:36px 24px 28px}.reading-meta{font-size:9px;letter-spacing:1.5px}.article-header{margin:27px 0 28px}h1{font-size:34px;line-height:1.22;letter-spacing:-.7px}.chinese-title{font-size:13px;margin-bottom:9px}.article-rule{margin-top:23px}.article-body{font-size:19px;line-height:1.96}.article-body p{margin-bottom:1.45em}.reading-end{margin-top:31px}.end-note{margin-bottom:37px}.review-footer{font-size:9px;flex-direction:column;gap:5px}.summary-note{font-size:9px}.floating-tools{gap:11px;padding:10px 12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}